Laser engraving machine for preparing rotary screen printing scr

Details Laser engraving machine for preparing rotary screen printing scr Laser engraving machine for preparing rotary screen printing scr

1988-11-25

1989-10-31

Broome, H.

Facsimile and static presentation processing

Facsimile

Recording apparatus

346 76L, 21912168, 21912184, 1011284, 101127, B23K 900, B05C 170, B41C 114

Patent

active

048781274

ABSTRACT:
A laser engraving machine for engraving rotary printing screens includes a shaft (1) having one end connected to a rotary drive (3)for rotating the shaft (1), two end ring assemblies (7, 8) at least one (8) of which is movable along the shaft (1) and which are arranged to locate concentrically and fix opposite ends of a rotary printing screen (2) to the shaft (1). The machine also includes a laser engraving device including a head (4) movable backwards and forwards parallel to the axis of rotation of the shaft (1) to engrave a printing screen (2) and a support (9, 13). The support (9, 13) is movable along the screen (2) with the laser engraving head (4) to provide local support for the screen (2) so that the part being engraved is supported at a constant predetermined position with respect to the head (4) of the laser engraving device. Preferably the suppport includes a ring (9, 13) having a cylindrical supporting surface and the ring (9, 13) has a radius of curvature slightly greater than that of the screen (2) and has its axis slightly offset radially inwards from the axis of rotation of the shaft (1).

REFERENCES:
patent: 3759800 (1971-09-01), Reinke
patent: 3763030 (1973-10-01), Zimmer
patent: 4808790 (1989-02-01), Ruckl

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